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I had an older modem tm225r that I replaced with a t25 because of fluctuating speed issues.

It could vary from 250 or 300 to under a 100 (wired).

Measuring from the Ethernet port on the t26 using a laptop and using Comcast speed site,with the new modem I still get under a 100 even though my service says 500 down.

There were issues with cabling and connectors that they just replaced.

His handheld meter is saying 600 down,but several different laptops said under 100.

Any ideas?

Are you using a good quality cat 5e or cat 6 cable? I’ve seen sketchy cat 5/cat5e cables connect at 10/100mbps speeds and not gigabit.

What device are you testing on? Does it support gigabit speeds? 

Have you tried other devices?

Do you have a screen snip of the cable connections page and event logs? 

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